package com.example.weatherapp;

import android.app.ProgressDialog;
import android.content.Intent;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.Toast;

import androidx.fragment.app.Fragment;

import com.example.weatherapp.databinding.ChooseAreaBinding;
import com.example.weatherapp.db.City;
import com.example.weatherapp.db.County;
import com.example.weatherapp.db.Province;
import com.example.weatherapp.util.HttpUtil;
import com.example.weatherapp.util.Utility;

import org.jetbrains.annotations.NotNull;
import org.litepal.LitePal;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.Response;

public class ChooseAreaFragment extends Fragment {
    public static final int LEVEL_PROVINCE=0;
    public static final int LEVEL_CITY=1;
    public static final int LEVEL_COUNTY=2;
    private ProgressDialog progressDialog;
    private ArrayAdapter<String> adapter;
    private List<String> dataList=new ArrayList<>();
    private List<Province> provinceList;
    private List<City> cityList;
    private List<County> countyList;
    private Province selectedProvince;
    private City selectedCity;
    private int currentLevel;
    ChooseAreaBinding binding;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        binding=ChooseAreaBinding.inflate(inflater,container,false);
        adapter=new ArrayAdapter<>(getContext(), android.R.layout.simple_list_item_1,dataList);
         binding.listView.setAdapter(adapter);
         return binding.getRoot();
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        binding.listView.setOnItemClickListener((adapterView,view,position,id)->{
            if (currentLevel==LEVEL_PROVINCE){
                selectedProvince=provinceList.get(position);
                queryCities();
            }else if(currentLevel==LEVEL_CITY){
                selectedCity=cityList.get(position);
            queryCounties();
            }else if(currentLevel==LEVEL_COUNTY){
                String weatherId=countyList.get(position).getWeatherId();
                Intent intent=new Intent(getActivity(),WeatherActivity.class);
                intent.putExtra("current_province",selectedProvince.getProviceName());
                intent.putExtra("current_city",selectedCity.getCityName());
                intent.putExtra("current_county",countyList.get(position).getCountyName());
                intent.putExtra("weather_id",weatherId);
                startActivity(intent);
                getActivity().finish();
            }
        });
        binding.backButton.setOnClickListener(view -> {
            if(currentLevel==LEVEL_COUNTY){
                queryCities();
            }else if(currentLevel==LEVEL_CITY){
                queryProvinces();

            }
        });
        queryProvinces();

    }

    private void queryProvinces() {
    binding.titleText.setText("中国");
    binding.backButton.setVisibility(View.GONE);

    provinceList= LitePal.findAll(Province.class);
    if(provinceList.size()>0){
        dataList.clear();
        for(Province province:provinceList){
            dataList.add(province.getProviceName());
        }
        adapter.notifyDataSetChanged();
        binding.listView.setSelection(0);
        currentLevel=LEVEL_PROVINCE;
    }else {
        String address="http://guolin.tech/api/china";
        queryFromServer(address,"province");
        }
    }



    private void queryCities() {
    binding.titleText.setText(selectedProvince.getProviceName());
    binding.backButton.setVisibility(View.VISIBLE);

    cityList=LitePal.where("provinceid=?",String.valueOf(selectedProvince.getId())).find(City.class);
        if(cityList.size()>0){
            dataList.clear();
            for(City city:cityList){
                dataList.add(city.getCityName());
            }
            adapter.notifyDataSetChanged();
            binding.listView.setSelection(0);
            currentLevel=LEVEL_CITY;
        }else {
            int provinceCode=selectedProvince.getProvinceCode();
            String address="http://guolin.tech/api/china/"+provinceCode;
            queryFromServer(address,"city");
        }
    }
    private void queryFromServer(String address, String type) {
        showProgressDialog();
        HttpUtil.sendOkHttpRequest(address, new Callback() {
            @Override
            public void onFailure(@NotNull Call call, @NotNull IOException e) {
                getActivity().runOnUiThread(()->{
                    Toast.makeText(getContext(),"加载失败！",Toast.LENGTH_SHORT).show();
                });
            }

            @Override
            public void onResponse(@NotNull Call call, @NotNull Response response) throws IOException {
                String responseText=response.body().string();
                boolean result=false;
                if("province".equals(type)){
                    result= Utility.headleProvinceResponse(responseText);
                }else  if("city".equals(type)){
                    result= Utility.headleCityResponse(responseText,selectedProvince.getId());
                }else if("county".equals(type)){
                    result= Utility.headleCountyResponse(responseText,selectedCity.getId());
                }
                if (result){
                    getActivity().runOnUiThread(()->{
                        closeProgressDialog();
                        if ("province".equals(type)){
                            queryProvinces();
                        }else if ("city".equals(type)){
                            queryCities();
                        }else if("county".equals(type)){
                            queryCounties();
                        }
                    });
                }
            }
        });
    }

    private void closeProgressDialog() {
        if (progressDialog!=null){
            progressDialog.dismiss();
        }
    }
    private void showProgressDialog() {
    if(progressDialog==null){
        progressDialog=new ProgressDialog(getActivity());
        progressDialog.setMessage("正在加载...");
        progressDialog.setCancelable(false);
    }
    progressDialog.show();
    }

    private void queryCounties() {
        binding.titleText.setText(selectedCity.getCityName());
        binding.backButton.setVisibility(View.VISIBLE);

        countyList=LitePal.where("cityid=?",String.valueOf(selectedCity.getId())).find(County.class);
        if(countyList.size()>0){
            dataList.clear();
            for(County county:countyList){
                dataList.add(county.getCountyName());
            }
            adapter.notifyDataSetChanged();
            binding.listView.setSelection(0);
            currentLevel=LEVEL_COUNTY;
        }else {
            int provinceCode=selectedProvince.getProvinceCode();
            int cityCode=selectedCity.getCityCode();
            String address="http://guolin.tech/api/china/"+provinceCode+"/"+cityCode;
            queryFromServer(address,"county");
        }
    }


}
